The growth patterns of plant cells assume the following types. A. Diffuse growth: the whole cell more or less
grows on entire facets of the cell. B. Tip growth: only the tip of the cell grows. C. Inclusive growth:
combination of A and B.
When diffuse growth occurs in plant cells, the cell wall must be loosened, and the growth direction is affected
by the orientation of the cellulose microfibrils constituting the cell wall. In cells undergoing diffuse growth, a
cellulose synthase complex synthesizes cellulose microfibrils while moving on the cell membrane along the
orientation of cortical microtubules inside the cell membrane.
Figure 1.
Using the information and data, determine which of the statements are true or which are false.
Q10-1. Select a combination that correctly matches the types of growth (A to C) and the types of plant cells.
Q10-2. The following schematic diagrams (1) to (4) show the orientation of cellulose microfibrils of the cell wall (CW) and the orientation of cortical microtubules (MT) in plant cells extending in the longitudinal (growth) direction. Choose the most appropriate combination.
Figure 1.